应用化学 ›› 2010, Vol. 27 ›› Issue (08): 935-938.DOI: 10.3724/SP.J.1095.2010.90518

• 研究论文 • 上一篇    下一篇

高氯酸盐与十六烷基三甲基溴化铵作用的光散射

许佳丽,李原芳*   

  1. (发光与实时分析教育部重点实验室,西南大学化学化工学院 重庆 400715)
  • 收稿日期:2009-08-03 修回日期:2009-12-19 出版日期:2010-08-10 发布日期:2010-08-10
  • 通讯作者: 李原芳,女,硕士,教授; E-mail:liyf@swu.edu.cn; 研究方向:光谱分析
  • 基金资助:
    重庆市科委自然科学基金计划(CSTC, 2008BB0248)资助项目

Interaction of Perchlorate and Cetyltrimethylammonium Bromide Investigated by Light Scattering Technique

XU Jia-Li, LI Yuan-Fang*   

  1. (Education Ministry Key Laboratory on Luminescence and Real-Time Analysis,College of
    Chemistry and Chemical Engineering,Southwest University,Chongqing 400715)
  • Received:2009-08-03 Revised:2009-12-19 Published:2010-08-10 Online:2010-08-10

摘要:

利用光散射光谱法研究了高氯酸根和阳离子表面活性剂十六烷基三甲基溴化铵(CTAB)的作用。 在酸性条件下,高氯酸根和CTAB通过静电作用形成离子缔合物,导致体系光散射强度增强。 环境水样中的常见阴离子如Cl-、Br-、ClO3-、NO3-和PO43-等与CTAB单独作用时其光散射强度很弱,而当它们与高氯酸根同时存在时,由于协同作用使体系散射强度发生改变。 以Cl-为例,借助动态光散射测定,初步探讨了体系协同作用的机理。

关键词: 高氯酸根, 十六烷基三甲基溴化铵(CTAB), 光散射, 动态光散射

Abstract:

Light scattering(LS) technique was employed to investigate the interaction between perchlorate and cationic surfactant cetyltrimethylammonium bromide(CTAB). It was found that perchlorate could combine with CTAB in an acidic medium to form ionic associated compounds due to the electrostatic attraction, resulting in enhanced LS signals. It should be noted that anions such as Cl-, Br-, ClO3-, NO3- and PO43- can only induce weak LS signals when interacting with CTAB alone, but significant changes of LS signals can be observed once these anions coexist with perchlorate, indicating that coordinating effects exist. In order to discuss the coordination mechanism, dynamic light scattering(DLS) measurements were further made with chlorate(Cl-) as an example.

Key words: Perchlorate, Cetyltrimethylammonium Bromide (CTAB), Light Scattering (LS), Dynamic Light Scattering (DLS)

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